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IMPORTANT TOPICS for Class XII Chemistry Board Exam: p, d and f Block elements

Meritnation|Mar 10th, 2012 03:24pm

p-Block Elements

Structures of Oxoacids: phosphorus (2007), sulphur (2007),

Structures of Fluoride: sulphur (2008), xenon (2008, 2009), bromine (2009)

Interhalogen compounds (2007)

Basicity of group 15 elements (2008, 2009)

Most important topics/questions

  1. Structures of PCl5, H2SO3, H2SO4, H2S2O8, H2S2O7, HOCl, HClO2, HClO3, HClO4
  2. Complete the following reaction:
    • P4 + NaOH + H2O →
    • P4 + SO2Cl2
    • POCl3 + H2O→
    • KMnO4 + HCl →
    • NaOH + Cl2
  3. Conceptual questions:
  • NF3 is an exothermic compound whereas NCl3 is not.
  • NH3 is a stronger base than PH3. Why?
  • Arrange the following in order of the indicated property:
    • F2, Cl2, Br2, I2 in increasing order of bond dissociation enthalpy
    • HF, HCl, HBr, HI in increasing order of acidic strength
    • NH3, PH3, AsH3, SbH3, BiH3 in increasing order of basic strength
  • What are interhalogen compounds?

Chapter 8: The d- and f- Block Elements (5 marks)

  • Variable oxidation states of transition elements (2007, 2008)
  • Formation of coloured ions by transition metal ions (2007, 2010)
  • Lanthanoid contraction (2007, 2008, 2009)
  • Oxidation states of actinoids (2009, 2011)

NCERT questions which have been asked previously

Page Question Number Year
211 Example 8.1 2010
220 Example 8.7 2010
220 Intext question 8.6 2010
232 Intext question 8.10 2009, 2008
234 Exercise-8.7 2007
- 8.11 (ii) 2008
- 8.11 (iii) 2007, 2010
- 8.11 (iv) 2008
- 8.21 (i) 2009

Add Comment Total Comments (25)

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  • 11. feba  |  February 1st, 2013 at 7:40 pm

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  • 13. manyata  |  December 21st, 2012 at 12:38 pm

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  • 18. Sanjay bharti  |  September 13th, 2012 at 8:53 am

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  • 19. Prashant  |  August 28th, 2012 at 7:07 pm

    Thankyou

  • 20. kajal kumari sahu  |  August 18th, 2012 at 10:59 am

    p,d,f elements are very vast so please can you tell me how to cover this chapter in short term and important topics in this chapter

  • 21. pradeepa  |  April 9th, 2012 at 10:29 pm

    very useful, thanks a lot

  • 22. don  |  March 12th, 2012 at 11:29 am

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  • 23. Susmeet Jain  |  March 11th, 2012 at 9:50 am

    thank you so much!!

  • 24. Leher Malhotra  |  March 11th, 2012 at 8:33 am

    P-block is very vast. But we can filter out important (and expected) things using this post and prev. year papers.

    Thanks You so much, Team Meritnation!

  • 25. Mejo  |  March 10th, 2012 at 8:03 pm

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